Sheet-cleaning machine.



S. E. DIESCHER.

SHEET CLEANING MACHINE.

APPLICATION FILED DEC-10.1917.

INVENTOR 3 SHEETS-SHEET I.

Patented Sept. 24, 1918 S. E. DIESCHER.

SHEET CLEANlNG MACHINE.

APPLICATION FILED 0:010, 19x7.

Patented Sept. 24,1918.

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S. E. DIESCHER.

SHEET CLEANING MACHINE.

APPLICATION FILED 05c. I0, 1917.

Patented Sept. 24, 19151 3 SHEETSSHEET 3.

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SAMUEL E. DIESCI-IER, 0F PITTSBURGH, PENNSYLVANIA.

SHEET-CLEANING MACHINE.

Specification of Letters Patent. Patented 86131324, 19 1 8-Applieationfiled December 10, 1917. Serial No. 206,432.

To all whom it may concern:

Be it known that I, SAMUEL E. DInsoHnR,

residing at Pittsburgh, in the county of Alle- 'the plates are fedbetween rolls revolving in a box containing bran or other cleaningmaterial. Such machines embody a series of pairs of rolls through whichthe sheets are fed and the action of the rolls is such that the bran orother cleaning material is carried along with the sheets or plates fromthe front end of the machine where the sheets are introduced, to theback part of the box, and hence it is necessary to provide means wherebythe bran may be discharged from the box and returned to the front end,it being desirable to use the bran over and over for cleaning purposes.The use or prac tice has been'to provide an outlet through which thebran can pass through the bottom of the box into a trough or receptaclefrom which it is elevated and returned to the front end of the machine.Such mechanisms consist of a plurality of conveying devices and.

are complicated and difficult to maintain in operative condition.

The object of the invention described herein is toprovide for the returnof the bran in a substantially horizontal plane to the front end of thebox, the return movement being'in a reverse direction and substantiallyparallel with the forward or cleaning movement of the bran by therolls.Theinven tion is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification,Figure 1 is a sectional elevation of a cleaning machine embodying myimprovement; Fig. 2 is a transverse section, the plane of section beingindicated by the l111e..IIVII, Fig.1, and'Fig. 3 is a sectional planview on a plane indicated by the line IIIIII, Fig. 1.

In'thepractice of the invention, the machine, as regards the inclosingbox 1, the pairs of'cleaning rolls 2, and the polishing rolls 3, isconstructed in the nsual or any. suitable manner, except that 111 thebottom of the box are formed a plurality of open-- to troiwhs 4 extendinlon 'itudinall r of the box. Within these troughs are arranged screwconveyers 5 constructed and operated so as to move the bran, droppinglnto the trough, forward toward the front end of the r machine where theshaft of the conveyeris provided with a conical block 6, adapted todivert the bran upward between the front end of the box and thefirstpair. of cleaning rolls. By the operation of this conveyer, thespace between the front end of the boxgand' the first pair of rolls willbe filled with a mass of more or less compacted. bran or other cleaningmaterlal, so that sheets fed into the box through the opening 7 pro-.

vided in its front wall, will be caused to pass through this mass ofbran; and in between the first pair of rolls, which, as the spacebetween such rolls and the front of the box is filled with bran, willcarry portions of the,

latter in between the rolls and the sheets. In order to prevent the branfrom escaplng through the opening 7, a plate Sfis so arranged across thesaid opening aste permit thefree inward movement of the sheets but.

to prevent any outward movement of the Provision is made for thedischarge of the bran from the box by making a series of openingsthrough the bottom of the troughs ad acent to the front ends ofthemachines,-

said openings 7 being normally closed 'by hinged doors 9 which maybe-operatedby any suitable means, such forexample as that shown,consisting of a'shaft 10 havingfan operating handle 11 and provided witharms 12 which are connected'by links 13 to lugs 14 on the undersides ofvthe doors. l

In order to prevent the bran from being drawn from between the pairs ofrolls by the f oppositely moving return flow, the spaces between theadjacent lower rolls are closed by means of V-shapedpieces 15 supportedby rods 16 extending up. through lugs 17 on the inner walls ofthe sidesof'the box. These the surfaces of the adjoining.rolls thatsmallquantities of the bran in the pockets formed by adjacent, lower rollsand. the V shape d pieces, can passdown into the troughs 4:.

Theamount'thus allowedto escape should be approximately equal tothequantity carried into-the pockets .bv the sheets androlls,

itbeing desirable that the level of the bran V-shaped pieces are soadjusted relative to '7 in the pockets should coincide with the I planeof movement of the sheets between the rolls. The V-shaped pieces are sosupported as to permit of their easy removal and in practice it is founddesirable to remove one or more of these pieces so that the first orsecondpair of cleaning rolls at the rear of the series can be used aspolishing rolls. A partition 18 is arranged transverse of the boxasuitable distance in the rear of the'last pair of cleaning rolls therebyforming a vertical passage through which bran can be dropped into thetroughs 4. In this partition is formed an opening for the passage of thesheets between the supporting roll 19 and the brushes 20, whereby brancan be removed from the sheets before they pass between the polishingrolls 21. The troughs and conveyers are preferably extended under thebrushes and polishing rolls for the reception and return of bran removedfrom the sheets by the operation of the brushes and polishing rolls.

In order to prevent the bran from so packing in the space between thefront of the box and the first pair of rolls, so as to prevent its freeupward movement, a stirring rod 22 is arranged in such space as shown inFig. 1, consisting of a shaft provided with a series of projecting arms23 preferably constructed in the form of propellerblades, but alternatearms being arranged with opposite inclination so as to prevent anytransverse movement of the bran in this space.

It is preferred to operate the feed rolls of this machine by a gearingarranged in a housing described and claimed in an application filed byme under date of April 21, 1917, Serial Number 163645. The conveyershafts are provided at their rear ends with beveled gears 24intermeshing with corresponding gears on a counter shaft 25 arrangedacross the end of the mechaine and operated in any suitable manner fromthe train of gearing in the housing. The stirring rod is also operatedby any suitable connection from this gearing.

, It has been proposed to arrange a screw conveyer in a tube locatedbelow the box in which the cleaning is effected, said tube extendingfrom an opening in the bottom of the box at the rear end thereof toanother opening adjacent to the front end of the box. This tubularconveying device is arranged on the median line of the machine 7 andhence there will not be any such lateral spreading of the cleaningmaterial at the front end of the box as will insure a distribution overthe entire surface of the sheets when passing through the cleaningrolls. And further, only so much of the copies of thispatent may beobtained for cleaning material as is swept from the sheets by thestripper is returned to the front of the machine.

It is characteristic of the improvement claimed herein that by theemployment of open topped troughs, all material dropping below thecleaning rolls will be returned to the front of the machine, and as aplurality of troughs are employed, the material will be returned to thefront in a plurality of lines and hence when a sheet enters the machinethe cleaning material will be evenly distributed over the surface.

I claim as my invention:

1. In a sheet cleaning machine the combination of a box, a series ofpairs of leaning rolls adapted 'to rotate in said box, a plurality ofopen topped troughs arranged below the cleaning rolls and means formoving material along said trough to a point in front of the first pairof cleaning rolls.

2. In a sheet cleaning machine, the combination of a series of pairs ofcleaning rolls, means for moving the cleaning material in a directionthe reverse ofthe movement of sheets being cleaned and in linesapproximately parallel with the lines of movement imparted to thematerial by the sheets and rolls.

3. In a sheet cleaning machine, the combination of a series of pairs ofcleaning rolls and means for moving the cleaning material from aplurality of points below the last pair of rolls in substantiallystraight lines to points in front of the first pair of rolls and upwardinto the path of movement of sheets into'the bite of the said rolls.

I. In a sheet cleaning machine the combination of a box, a series ofpairs of cleaning rolls adapted to rotate in said box, a plurality ofthe conveyers arranged within the 7 box below the pairs of rolls and atan angle thereto and adapted to move the bran in substantially parallellines to the front end of the box and means for forcing the bran and thefirst pair of rolls and a stirring rod arranged above the conical block.

In testimony whereof I have hereunto set my hand.

SAMUEL E. DIESGHER.

five cents each, by addressing the commissioncr cf latentl. Washington,D. c.

